Furnace



s. HILLYER. FURNACE. APPLICATION FILED FEB. 10, I919.

.- I INVENTQR.

BY JWJ/a? A TTORNEYS.

Patented Oct. 19, 1920.-

' JAME ssQnrLLYsn, OF'DULUTEMINNESOTA.

' FURNACE.

To all whom may 00% cor-n.

-Be it known that I, Janine 'S. HI LYER, a citizen of the UnitedStates, residing at Duluth in the county ofSt. Louis and State of Minnesota, have invented certain new and useful Improvements in Furnaces, of which I do hereby declare the following to be a specification.

My invention relates tofurnaces and has for its ob ect the PIOVISIOH ofan improved furnace for heating purposes which may be adapted to be used in connection either with V i a hot air or a hot water radiation system.

It has for one of its objects the provision of a core of non-combustible material adapt-.

ed to extend into the fuel body whereby the fuel, such as coal, is excluded from the -center of the furnace and confined to an annular space between said core and the inclos- 111g wall.

"tainer of air or water to be heated.

With these and other objects in view it consists of the structure, combinatifons and arrangements of parts hereinafter descrlbed and clalmed.

In the drawings, Figure 1 is a central vertical section of one form of my said invention. Fig. 2 is a central vertical section forming part of said invention. I

a front elevation of the form of said 1nvenof a modified form of said invention. Fig. 3 is a top plan iew ofa' part of a grate tion shownin Fig. 1. r

In the drawings, 1 'is a base section or ash chamber, of any suitable'form or structure, uponwhich is mounted a fuel chamber, adapted to contain burning hard fueLsuch as coal, which fuel chamber mayyifdesired, I p

' (not shown) of any suitable structure may embody a double wall 2 and 2 ('asin Fig. 2) with an intervening air or water space 2 or if preferred, said water space 2 and wall 2* may be omitted (as in Fig. 1) EX tending over said fuel chamber and preferably supported thereby is a chamber '3 adapted to contain fluid, as air or water, which chamber. is providedwith a reduced central portion 3 which extends into said fuel chamber'and is adapted to form a core in the fuel body whereby the fuel is; ex-

- eluded from the center of; said fuel chamher and confined to an annularspace 4 formed between said core and the 'inclosing wall of said fuel chamber. Extending through said chamber 3, is a seriesof flues 3 f any suitable form or structure, prefer-.

Application filed February 10, 1919. Serial No. 27 ,10

It has for" a further, object the adaptation of such coreto service asa conably narrow crescent-shaped slots through i NT 0mm Specification of Letters Patent. Patented 19; 1920 which'thesmoke .and 'ases may pass upward from'the fuel chamber to a smoke'or gas combustion chamber 5 mounted upon said chamber If the water space 2? is in-- 'cluded in the structure, ports 2? are provided leading from said space 2P intoflthe chamber 3. Upon said chamber 5' is frnounted a hood, 5* of any suitable structure, as is wellkn'own to the art,with which hood the chimney connecting pipe 6 is engaged;

grate, and preferably also forjsteadying Within said j-base section is a's'pider of"; I any suitable structure,f0r supporting the thelbwe'r 'end of' said coreythelower end of; sa d corebeing preferably furtl1er-re,.

spider. -Mountedupon any suitable "sup Zduced as at 3 to formv awristtojengagefl gsaldfgrate and preferably to engage said p preferably comprising two semi circular sections for cenveniencef is assembling, which sections are adapted to5-be bolted together in any suitable manner, as at- 8e. Said grate 1 is approximately. dish-shaped or concaved with its periphery extending upward'into said fuel chamber. The area fofsaid grate below said annular fuel space; d'preferably consists "ofaseries of radial arms8l remadas at 8. i {Said grate'belowthe body portion of said core preferably has broadseg 7 mental openingsSS formed thereinfthrough T I, which the coarser'cinders may fall into the ash pit. A grate-shaking-lever"8 may 'eX, tend from the central ringofsaid grate to apoint" nearthe'frontf of 'the baseiandop f posite' to a horizontally disposed slot -in v i said base through which an extension lever be directed and engaged withsaidshaking lever. Said s'lotmay be covered by a door 8 when said extension lever isnot in use.

cold air or cold water supply pipe 9 extends into the lower end of said core at any suitable point, and if said water or air space 2 is provided, a branch supply pipe 9 is provided communicating with said space 2 near its lower end. A hot water or air exhaust, or circulationpipe 10 communicatinl gwith the upperf'end/of said fluid chamber at any suitable point and ex tending in; any suitable direction is adapted to conduct the heated air orwater from said chamber 3 to the radiation sy tem (not vided in said base, and a suitable check draft door or clean-out door "12 is provided either in said hood or in the wall of said chamber 5. In view of the presence of said core, I prefer to have a plurality of stoking doors, so that the fuel may be conveniently and evenly distributed around said core.

Said doors may be located at any convenient points but double doors at the front as 18 and 1% affording a wide stoking'passage are believed to be sufficient since a suitable poker can be inserted to rake the fuel behind the core to a common level with the fuel at the front and sides. If desired a wide single door may be substituted for said double or plurality of doors;

@ne purpose of the core is to avoid waste of fuel at the center of the fuel chamber. By experimentation I have found; that a core composed of well-burned ashes will accomplish this purpose and that the lire fuel between such core and the inclosing wall of the furnace as effectively heats the water in the outer and overhead chambers as when the ash core is m indicating that the excess heat from the center of the solid body of fire tends to waste in the chimney/A further indication of this is that without theash core in the furnace experimented with, the pipe connection be tween the chimney and the furnace is usually very warm or hot, while during the use'of the ash core such connection is cool. Another purpose of the core in my furnace is to bring into contact with the burnin body of fuel an additional area of surface desired to be heated, whereby a larger proportion of the heat units are absorbed close to the points of their liberation and the loss of heat in the chimney is reduced to a minimum.

Having now described my invention,- what, I claim 1s 1. In a furnace, the combination of a base unit, a fuel chamber unit, grate adapted to approximately close the lower end of said fuel chamber a unitary fluid heating chamber extending entirely across the upper end of said fuel chamber and provided with a reduced portion extending centrally 'intosaid fuel chamber to a point below the horizontal plane of the upper part of said grate, said fluid heating chamher having flues formed in the overhead portion thereof for the passage of products of combustion from said .fuel chamber, a smoke box unit extending over said fluid heating chamber and communicating with.

said fines, a fluid circulation pipe communicating with the lower end of said depencb ing portion of said fluid heating chamber and a fluid circulation pipe communicating portion of said fluid chamber having fiues formed in the overhead portion thereof for the passage of products of combustion from said fuel chamber, said second fluid; chamber having passages formed in the overhead portion thereof adapted to communicate with the upper end of said first fluid chamber, a

Lsmoke box unit extending over said second fluid chamber and communicating with said fines, a-flu1d circulation pipe commun catchambei, a-circulation pipe communicating with the lower end of the reduced portion of said second fluid chamber, and circulation pipe communicating with the overhead portionof said second fuel chamber.

In testimony whereof, I hereunto afiix my signature, in presence .ofitwo witnesses. v JAMES S. HILTJYER; Witnesses: 1

Hrcns H.-CoRsoN,I WILLIAM 10, PEALER.

ing' with the lower end of said first fluid 

